Test Facility
The Evidence is found on a desk in the same room that Dr. Green starts in. There are quite a few people in the room however so you are probably going to need a disguise to get to it.
Decontamination
You'll come close to this evidence if you follow the walkthrough. When you get to the locker room, you'll notice a guard station nearby. In the guard station, a bunch of guards will be watching a fight. On the coffee table in the middle of the room will be your evidence.
R&D
You'll be able to get this evidence by following the walkthrough for this mission. In the R&D department, you'll find this on the bottom floor on the left side of the ring. It is on a table next to one of those privacy screens.
